Clutching device for forges



2 sheets-.sheet 1. i

(No Model.)

G. 'HAMMELMANN I GLUTGHING DEVICE POR FORGES. No. 369,177..

Patented Aug (No Model.) 2 Sheets-Sheet 2.

G. HAMMELMANN.

GLUTCHI'NG DEVICE EOE FORGES.

Patented Aug. 30, 1887'.

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UNITED STATES,

PATENT OFFICE.

vCHARLES HAMMELMAVNN, OF BUFFALO, NEW YORK.

CLUTCHING DEVICE FOR FORGES.

SPECIFICATION-forming part of Letters Patent No. 369,177, dated August 30, 1887.

I Application filed October 30, 1886. Serial No. 217 554. (No model.)

To all whom, t may concern:

Be it known that I, CHARLES HAMMEL- MANN, ofthe city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Clutching Devices for Forges, &c., of which the following is a specification.

This invention relates to an improvement in that class of mechanical movements which are employed for converting reciprocating motion into rotary motion, and which are more especially used for'converting the oscillating motion ofahandlever or treadle into a rapid rotary motion for operating the fans of portable forges and the rotary parts of other machines which are operated by the hand or foot of a person.

My present invention has particular reference to a mechanical movement of this kind in which the reciprocating motion of a rackbar is converted into rotary motion by a clutch mechanism. A mechanical movement of this description is described and claimed in Letters Patent of the United States granted to me April 6, 1886, No. 339,547.

The object of my present invention is to render the device more compact, to reduce the friction in the clutch mechanism, and to construct the parts in such manner that they can be manufactured and itted at less expense than heretofore.

My invention consists of the improvements, which will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure l is a side elevation of a portable forge provided with my improvement. Fig. 2 is a fragmentary vertical section through the driving-wheel and connecting parts, on an enlarged scale. Fig. 3 is top plan view, partly in section, showing the parts of the clutch separated. Figs. 4 and 5 are cross-sections in lines x @c and y y, Fig. 2, respectively. Fig. 6 is a fragmentary vertical section through the driving-wheel, showing a slightly modified construction of the clutch mechanism. Fig. 7 is an elevation showing the parts of the modified clutch mechanism separated. Fig. 8 is a cross-section in line w fr, Fig, 7. Fig. 9 is an end elevation of the part of the clutch to which the pinion is secured.

Like letters of reference refer to like parts in the several gurcs.

A represents the bowl or hearth of a portable forge, supported on legs a and provided with a hood, c.

B represents the fan or blower, secured to the under side of the bowl A and provided with a pulley on its shaft.

C represents the drivingwheel, connected with the pulley on the blower-shaft by an endless belt, c, and mounted loosely on a horizon tal arbor, d, which is supported in the frame of the machine.

E represents a clutch-ring formed on one end of the hub of the driving-wheel concentric with the arbor d.

F represents a loose clutch-ring, which is mounted loosely on a sleeve or bushing, f, the latter being fitted loosely on the arbor d, as represented in Fig. 2. The loose clutch-ring F is adapted to be pressed against the clutchring E of the driving-wheel, and is capable of a limited motion toward and from the clutchring E in the longitudinal direction of the arbor.

G represents the driving clutch-ring; which is mounted loosely on the arbor on the outer side of the loose clutch-ring F. The rings F and G are provided on their adjacent sides with interlocking ratchet-teeth h and i, respectively, having inclined faces and abrupt backs. f

' .I represents a sleeve formed on the outer side of the clutch-ring G and turning on the arbor d. j is a pinion formed onor secured to the sleeve J.

K represents a vertical rack-bar, which is guided in vertical ways 7c, as' described and shown in my aforesaid Letters Patent, and which engages with the pinion j and rotates the latter and the clutch-ring G alternatelyin opposite directions by its reciprocating motion.

L represents a cylindrical case which incloses the clutch mechanism, and which is secured to the driving-shaft C by bolts Z, so as to rotate therewith. This case is provided at its outer end with a flange, l', which overlaps the clutch-ring G and tits snugly against the IOO sleeve J, as represented in Fig. 2. By means of this case the clutch mechanism is protected against dust, cinders, &c., and prevented from coming in contact with the clothes of the operator or other objects.

M represents the pivoted hand-lever, which is connected with the rack-bar K by a rod, m. The latter is attached to the rack-bar and the hand-lever by suitable eyes, which permit of a sufficient lateral movement of the hand-lever on its pivot to allow the operator the requisite freedom of movement for reaching tools, &c., while operating with the handlever.

During the upward movement of the rackbar K the pinion j and the clutch-ring G are rotated in the direction of the arrow in Fig. 3, with the inclined faces of the teeth i for wardly. The inclined faces of the teeth engage during this movement against the inclined faces of the teeth It of the loose clutchsleeve F, whereby the latter is moved on the sleeve f toward the driving wheel C and wedged against the clutcirring Eof the driving-wheel, thereby rotating the latter in the direction of the arrow.

In order to produce a positive engagement of the clutch-rings F and E, these rings are provided on their adjacent sides with ratchetteeth having abrupt faces and inclined backs, as represented in Figs. 2, 3, and 4. I/Vhen a mere frictional contact between the clutchrings is sufficient to transmit the desired motion to the driving-wheel, the adjacent faces of these rings may be made plain, as represented in Figs. 6, 7, and S. During the downward or return stroke of the rack-bar K, the clutchsleeveGis rotated in an opposite direction, with the abrupt backs of the teeth t' forwardly and engaging against the abrupt backs ofthe teeth h of the ring F. Thelatter is thereby caused to rotate backwardly and disengages itself from the clutch-ring E. The inclined backs of the teeth on the clutch-rings Fand E facilitate this disengagement ofthe clutch-rings at the beginning of the return-stroke. rlhe driving-wheel C continues its rotative movement during the returnvstroke of the rack-bar by reason of its own momentum and of the momentum of the rotating parts which are driven from the driving-wheel.

In the modified construction represented in Figs. 6 and 7 the loose clutch-ring F is mounted upon a sleeve,f, which is secured to the driving-wheel, instead of being mounted upon a loose sleeve, f, as represented in Fig. 2. I prefer the last-mentioned construction,

because the loose sleeve f is capable of a rotary movement on the arbor independent of the driving-wheel, whereby the friction of the loose clutch-ring against its supporting-sleeve is greatly reduced and the movements of the clutchring are correspondingly facilitated.

In the modified construction represented in Figs. 6 and 7, the clutch mechanism is protected by a case, L', which is cast in one piece with the driving-wheel, and the ange Z2 is secured to the outer end of the case by bolts. I prefer, however, the construction shown in Fig. 2, in which the case Lis detachable from the driving-wheel, because this construction affords free access to the clutch-disk E for finishing or cleaning the same.

W'hen the interlocking teeth in the clutch rings G and F are very long, their abrupt backs may be provided with cushioningpieces n, of rubber, leather, or other suitable material, whereby the impact of these surfaces against each other is deadened and the clicking noise is avoided which would result in the absence of such provision.

In the modified construction represented in Figs. 6, 7, 8, and 9, C' represents the drivingwheel, E' F G the clutch'rings, h' t" the teeth of the rings F and G', J the sleeve formed in clntchring G', andj the pinion formed on the sleeve J. These parts are the equivalents, respectively, of the parts C E F Ght' Jj, hereinbefore described, and represented Figs. l, 2, 3, 4, and 5.

I claim as my invention- 1. The combination, with the drivingwheel provided with a clutclrriug, E, of a reciproeating rack-bar, K, adriving clutch-ring, G, provided with a pinion, j, which meshes with said rack-bar, and a loose clutch-ring, F, arranged between the clutch-rings G and E and transmitting the forward motion of the ring G to the ring E, substantially as set forth.

2. The con'ibination, with the driving-wheel provided with a clutch-ring, of a driving clutch-ring and an intermediate loose clutchring, the driving-ring and intermediate ring having interlocking teeth whose abrupt backs are provided with cushioning-pieces n, substantiall y as set forth.

Vitness my hand this 25th day of October, 1886.

(JI-IAS. II AM MELMAN N.

fitnessesz JN0. J. BONNER, CARL F. GEYER.

IOO 

